HVAC, Appliance, CNC, and VFD Error Code Repair Guides

Browse repair guides for HVAC, appliances, refrigeration, CNC alarms, VFD faults, generators, boilers, water heaters, and commercial equipment.

• Danfoss FC302 Fault Codes - Alarm 14, 29, 38, and 57

  Updated: 18 Sep, 2026

  Danfoss FC302 fault-code guide for VLT AutomationDrive alarms: earth fault, heatsink temperature, internal fault, undervoltage, and current limit.

• Kohler Generator Fault Codes - Battery, Start, Oil, Voltage, and Ground Faults

  Updated: 18 Sep, 2026

  Kohler generator faults cover low battery, charger faults, fail-to-start, oil pressure, engine temperature, voltage, overcurrent, and ground faults.

• ABB ACS880 Fault Codes - 2310, 3130, 3210, FA81

  Updated: 18 Sep, 2026

  ABB ACS880 fault-code guide for 2310 overcurrent, 3130 phase loss, 3210 DC overvoltage, FA81 Safe Torque Off, fan, encoder, and fieldbus trips.

• APC Smart-UPS Error Codes - Battery, Overload, F06 Fan

  Updated: 18 Sep, 2026

  APC Smart-UPS error codes for replace-battery alerts, overload beeps, F01/F02/F06 faults, APCRBC cartridges, cooling fans, and network cards.